Shuttle-changing apparatus for automatic looms



K. TOYODA June 28, 1927.

SHUTTLE CHANGING APPARATUS FOR AUTOMATIC LOOMS Filed April 24. 19 26.

5 Sheets-Sheet 1 ATTORNEY June 28,1927. I v 1,633,962

K. TOYODA SHUTTLE CHANGING APPARATUS FOR AUTOMATIC LOOMS Filed April 24. 1926 3 Sheets-Sheet 2 ENTo \jgl @51 1, g B E 9 ATTORNEY June 28, 1927.

K. TOYODA SHUTTLE CHANGING APPARATUS FOR AUTOMATIC LOOMS Filed April 24. 1926 '3 Shee ts-Sheet 3 g v &

ATTORNEY Patented June 28, 1927 PATENT OFFICE.

UNITED STATES KIIOHIBO TOYODA, OF NAGOYA, JAPAN.

'SHUTTLECHANG'ING APPARATUS FOR AUTOMATIC LOOMS.

Application filed April 24, 1926. Serial No. 104,272.

.My invention relates to a shuttle changing apparatus adapted for use in any auto- 1 action of .the shuttle changing apparatus would be damaged. The object of this invention is to overcome this disadvantage. The above-mentioned object in view, according to the-present invention, the front and back sections or plates forming a shuttle box are carried by a common rocker arm and are made to be opened simultaneously when a shuttle is forced along the guide plate which is formed on the front of the said front plate of the shuttle box. The front and back plates are then caused to be automatition.

This shuttle ejecting rod 3 'cally' and simultaneously closed upon the completion of the'shuttle changing opera- Thus, according to this invention, the change of shuttles may be effected rapidly and smoothly, and with reliable accuracy.

In the accompanying drawings in which one embodiment of the invention is shown by way of example:

Fig. 1 is a cross-sectional side view of the apparatus,

Fig. 2 is a view similar to Fig. 1, but showing the position of the moving parts when the shuttle is changing, and

3 is a front elevation of a part of the slay.

I In the drawings,

which the shuttle magazine 2 is mounted. 3 is ashuttle ejecting rod for ejecting the lowermost of the shuttles in the magazine 2.

is adapted to slide to-and fro in a guide 4. One end of the rod 3 is connected by means of a'link 5 to the upper arm 6. Said arm 6 is fixed to a shaft 7 which is journaled in the frame 1.

To the shaft 7 is also fixed a lower arm 8 connected to a receiving rod 9'. By means of a hanging rod 12 a lever 13 1s connected to the central portion of rod 9. The other end of lever 13 is mounted to the pivot 14 which is journaled in the frame 1 and is connected to the feelerf motion, apparatus in such a manner that itis turned in the direction of I the arrow when the weft is broken or the bobbin becomes empty.

On the slay 15 are mounted brackets 16 carrying fixed thereto the trunnions 17 on which are rotatably mounted the rocker arms 18.

1 is the loom frame on' front plate 19 and the back plate 20 which are adapted to be opened or closed in unison according to the rocking movement of the arms 18. The said front and back plates 19 and 20 constitute a shuttle box which is further provided with a cover plate 21 mounted on the slay 15. An inclined guide plate 22 is formed on the front face of the front plate and a guide plate 23 is rockably mounted on the slay,- both plates 22 and 23 being adaptcdto be moved into a horizontal position, thus serving as a guide for the shuttle as it is ejected from. the magazine 2 toward the shuttle box. The rocker arms 18 are normally pulled downwardly by the action of coil springs 24 which are wound around the trunnions 17, so that the front and back plates 19 and 20 are normally maintained in the closed position as shown in Figure 1.

The lower guide plate 23 is rockably mounted by'the pivots 25 unto the brackets 26, and its front end is normally pulled down by a spring 27, so that the guide plate 23 is normally held in the inclined position shown in Fig. 1. When a shuttle is forced by the ejecting rod 3, along the guide plate 23,- the latter plate Wlll be rocked about the pivots ing rods 29 carrying a receiving bar 30. 'A

stop 31 is secured to the slay sword 10. As shown in Fig. 2, the ejected shuttle is embraced by the lower edge of the back plate 20, the upper edge of the bar 30, and the front face of said stop 31.

Should the weft be broken or the bobbin become empty, the pivot 14 is turned in the direction of the arrow by the feeling motion, thereby turning the rod 9 upwardly through the lever 13 and the hanging rod 12. When the sla 15 is on the forward beat, the notche projection 11 which is fixed on the slay sword 10 will engage with the rod 9,

and its motion will be transmitted to the shuttle'ej ecting rod 3 through the'lower arm 8, the upper arm 6 andthe link 5. Thus, the rod 3 will eject the lowermost of'the shuttles in the magazine 2, and the ejected shuttle will be forced, guided by the guide plates 22 and 23 andopening the front plate 19 against the action of the springs 24, into the shuttle box. As will be seen from Figure 2, the back plate 20 will be also opened at the same time and inunison with the said Said rocker arms 18 carry the front plate 19, so that the empty shuttle S in the shuttle box is pushed out by the new shuttle S and is then embraced on the front and back sides by the new shuttle S andapparatus, since the action of the latter apparatus would be damaged, if the loom were operated at an increased speed, nearly at the speed of the ordinary power loom. Such disadvantage is overcome by this invention, in which the back plate 20 being opened in unison with the front plate 19, the shuttle may be ejected rapidly and with minimum resistance, thereby considerably reducing the amount of ower required for shuttle changing operation. The invention therefore, can be applied to any high speed loom without an difliculty, and the shuttle may be changed exactly and rapidly. According to the invention, moreover, the shuttle is ejected from the shuttle box with minimum resistance and is discharged on the fall of the back plate 20, "being embraced on ahe front and back sides by the succeeding new shuttle and the stop 31' and on the upper and lower sides by the lower edge of the back plate 20 and the receiving bar 30, the shuttle being thus protected from any harm.

What I claim is v 1. A shuttle changing apparatus for automatic looms, comprising in combination with the slay, a shuttle box formed by a front plate and a back plate, thefront face of said front plate being provided with an inclined guide, and a common rocker arm for said front plate and said back plate to open and close the same in unison, the said front and back plates being opened simultaneously by a fresh shuttle and closed again simultaneously upon the completion of the shuttle changin operation.

2. A s uttle changing apparatus according to claim 1, comprising alower guide plate mounted on the slay, so as to act together with the inclined guide on said front plate as a guide for the fresh shuttle, as the same is forced toward the shuttle box.

3. A shuttle changing apparatus according to claim 1, comprising a guide plate rockably mounted on the slay, and means for normally holding said guide plate in an inclined position, said guide plate being adapted to be rocked into horizontal position at the same level of the bottom-of the shuttle box when it isengaged by a fresh shuttle.

4. A shuttle changing apparatus according to claim 1, comprising a lower guide plate mounted on the slay, so as to act together with the inclined guide on said front plate as a guide for the fresh shuttle, as the same is forced toward the shuttle box and a stop secured to the slay sword, so as to engage a side face of the ejected shuttle.

5. A shuttle changing apparatus according to claim 1, wherein said back plate is provided with a receiving bar, a supporting rod carrying said bar so that the ejected shuttle may be embraced by said receiving bar and the lower edge of said back plate.

In testimony whereof I a-ffix my signature KIICHIRO TOYODA. 

